Not sure if this was the one, but here's mine. I use black pepper b/c I never have white pepper on hand.Â
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SQUASH AND SWEET-POTATO SOUPÂ
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Active time: 1 hr Start to finish: 3 hr.
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3 lb butternut squash (1 large), halved lengthwise and seeds discarded
1 tablespoon olive oil
2 lb sweet potatoes (2 large)
1 large onion, chopped
White part of 1 leek, chopped
2 teaspoons chopped peeled fresh ginger
8 to 10 cups light vegetable stock or broth
White pepper to taste
2 to 3 tablespoons fresh lemon juice, or to taste
1 tablespoon honey (optional)
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Preheat oven to 400°F.
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Brush cut sides of squash with 1/2 teaspoon oil and arrange, cut sides down, in a shallow baking pan. Prick sweet potatoes all over with a fork and roast with squash until very tender, about 50 minutes for squash and about 1 1/4 hours for sweet potatoes.
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Cool vegetables and scoop flesh from squash into a bowl. Peel sweet potatoes and add to squash.
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Cook onion in remaining 2 1/2 teaspoons oil with salt to taste in a 6-quart heavy pot over moderately high heat, stirring occasionally, until golden brown, about 10 minutes. Stir in squash and sweet potato, leek, ginger, and 8 cups stock and simmer, uncovered, stirring occasionally, 30 minutes.
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Purée in batches in a blender (use caution when blending hot liquids), transferring to a clean pot. Bring to a simmer and, if too thick, add more stock. Season with salt and white pepper. Finish with lemon juice and, if desired, honey.
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Cooks' note:
• Soup may be made 2 days ahead, cooled completely, and chilled, covered. Reheat before serving.
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Makes about 12 cups.